Try dropping your tire pressure when you go off road, this gives you a bigger foot print and better traction.
Try being easier on the gas pedal.
And learn how to use the P brake to make the tire with the most traction spin instead of the tire with the least.

i have the same problem... i have an 09 2wd with nitto terra grapplers and i get stuck everywhere it seems like... got stuck in a gravel pit last weekend... barely pulled in the entrance to go fishing and wen tto leave and it wasnt thick at all i just started spinning... ive been stuck in someone's front yard, in a small sandy ditch, many other places n have only been driving since july... wish i would have spent the extra on the 4x4...

i already have the limited slip diff and i dont find it help too good...

Here's your link... I use a powertrax in the rear of my truck and an aussie locker in the front. The basic Idea is the locker stays locked all the time until you take a turn. At that time the outside wheel frees up so not to wear on tires and driveline. these things are designed to give 100% power split between the wheels. they do make a clunk sound when engaging/disengaging nothing to worry about. costs less than an air locker, wont chew up the tires like a full locker, and posi is made to stay on the streets SERIOUSLY.